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Finding the Fourth Proportional to 605,419.56, 907,658.10 and 391,735.98

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Solution

The fourth proportional to 605,419.56, 907,658.10 and 391,735.98 is: 587,299.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,419.56 : 907,658.10 = 391,735.98 : x
  2. Step 2: Convert to fraction form
    605,419.56/907,658.10 = 391,735.98/x
  3. Step 3: Cross multiply
    605,419.56x = 907,658.10 × 391,735.98
  4. Step 4: Simplify right side
    605,419.56x = 355,562,335,308.44
  5. Step 5: Solve for x
    x = 355,562,335,308.44/605,419.56
  6. Step 6: Final answer
    x = 587,299.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.